Here, If pcim_iomap_table will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
---
drivers/i2c/busses/i2c-designware-pcidrv.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index d6423cf..6a1907d 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -235,6 +235,10 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->controller = controller;
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
dev->base = pcim_iomap_table(pdev)[0];
+ if (!dev->base) {
+ dev_err(&pdev->dev, "I/O map table allocation failed\n");
+ return -ENOMEM;
+ }
dev->dev = &pdev->dev;
dev->irq = pdev->irq;
--
1.7.9.5
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